403240442 has 16 divisors (see below), whose sum is σ = 698663232. Its totient is φ = 172509120.

The previous prime is 403240441. The next prime is 403240451. The reversal of 403240442 is 244042304.

It is not an unprimeable number, because it can be changed into a prime (403240441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538718 + ... + 539465.

It is an arithmetic number, because the mean of its divisors is an integer number (43666452).

Almost surely, 2^403240442 is an apocalyptic number.

403240442 is a deficient number, since it is larger than the sum of its proper divisors (295422790).

403240442 is a wasteful number, since it uses less digits than its factorization.

403240442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078213.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 403240442 is about 20080.8476414717. The cubic root of 403240442 is about 738.7905993951.

Adding to 403240442 its reverse (244042304), we get a palindrome (647282746).

The spelling of 403240442 in words is "four hundred three million, two hundred forty thousand, four hundred forty-two".